Improvement in cutter-heads



E. A. ROWL'EY.

Improvement in Cutter Heads.

`N0. 125,618, Patented Apri9,\1872.

UNITE N'ri-rrns ArEN'r CFFICE.

EDWIN A. ROWLEY, OF WILLIAMSPORT, PENNSYLVANIA, ASSIGNOR TO MILLSPAUGH,ROWLEY St MILLSPAUGH, OF SAME PLAGE.

IMPROVEMENT IN CUTTER-HEADS.

Specification forming part of Letters Patent No. 125,618, dated April 9,1872.

To all whom it may concern:

Be it known that I, EDWIN A. ROWLEY, of Williamsport, in the county ofLycoming and in the State of Pennsylvania, have invented certain new anduseful Improvements in Cutter- Heads for PaneLRaisers; and do herebydeclare that the following is a full, clear, and cxact descriptionthereof, reference being had to the accompanying drawing making a partof this specification, in which- Figure l is plan view of the face ofthe cutter-head. Fig. 2 is a like view of the rear face of said head.Fig. 3 is a longitudinal section on the line :c w of Figs. l and 2. Fig.4 is a cross-section of .the same on the line z z of Figs. 1 and 2 5 andFig. 5 is a perspective view `of the cutter detached from its head.

' Letters of like name and kind refer to like parts in each of thefigures.

My invention belongs to a class of woodworking devices termedcutter-heads, and used as panel-raisers; and it consists, principally,in the construction and relative arrangement of the cutters and head,substantially as and for the purpose hereinafter specified. It consists,further, in the means employed for securing the cutters to or withintheir head, substantially as and for the purpose hereinafter shown.

In the annexed drawing, A represents the cutter-head,havin gin planviewthe general form of theletter S, and provided upon its rear face andcenter with a boss or hub, B, through which passes the shaft or axialbearing, upon and around which said head revolves when in use. Extendinginward from each of the curved ends a of the head A, and in a line at aright angle to the central longitudinal line of the same, is a slot, G,which is open upon the forward face of said head, and from thenceextends rearward and slightly outward (as sh own in Fig. 3) to adistance about equal to the thickness of said head, while upon theopposite side of the arm is provided a boss, A', which covers said slot,and gives to the part strength equal to that possessed by other portionsoi the device. A semicircular groove, c, is cut within the inner faceand at the 1ongitudinal center of the slot C, and at its lower end,becoming circular, passes through the boss A', and furnishes a passagefor abolt,

D, the inner or face end of which is provided with a head, d, thatprojects across said slot, and has an inclination corresponding to theline of the face of the cutter-head, while the oppo site end of saidbolt is threaded and provided with a` nut, D'. The face of the boss A',im.

mediately beneath the nut D', is inclined at a corresponding angle, soas to furnish a firm bearing for the same. The cutter E is formed of orfrom a bar of rectangular steel, having a thickness just equal to thewidthof the slot O, and has its inner or shank end fitted to or withinthe same, with its outer edge just iiush with the face of thecutter-head. A notch, c, corresponding in size, shape, and position tothe like features of the bolt-head d, provided within the cutter-shank,receives and contains said head, so that when the nut D' is screwedinward said hea-d will be drawn down upon the bottom of the notch c andpress said cutter against the bottom of the slot C with sufficientrmness -to insure its lateral position when in operation, while thelongitudinal position of said cutter is insured by the presence of saidhead cl within its notch. From the end a of the cutter-head the cutter Eextends inward, and has its edge beveled rearward, so as togive a freecut, while the back of said cutter is also beveled from near itslongitudinal center toits outer end, so as to produce at the latterpoint a' cutting-edge. The cutting-edge of the cutter E has, preferably,a line corresponding to and parallel with the face of the head A, andthe end of said cutter an inclination of about sixty degrees from theline of said cutterhead face; but either of said cutting-edges may bevaried to suit the inclination or wishes of the operator.

The special advantages obtained by this construction and combination ofparts, are- First, the cutters are more readily attached to or detachedfrom their head than are those of ordinary construction. Second, owingto the peculiar manner of their attachment to or with in thecutter-head, the cutters cannot become accidentally detached therefrom,whereby the operation of the machine is attended with far less dangerthan would otherwise be the case. Third, from the shape of the cuttersgreat ease and perfection of operation are secured, while the labor ofkeeping the same in order is but slight. Fourth, the peculiar shape ofthe head and cutters insure their perfect clearance from shavings, andthereby removes a source of considerable annoyance to the operator.

Having,` thus fully set forth the nature and inerits of my invention7what I claim as new 1s 1. The relative arrangement of the cutters E andhead A, when constructed as and forthe purpose specified.

2. In combination with the cuttenhead A provided with the slot O andgroove c, and

with the cutter E provided with the notch c, the boltD provided with thehead d and with the nut D, substantially as and for the purpose shown.

In testimony that I claim the foregoing I have hereunto set my hand this27th day of January7 IS7 2.

EDWIN A. ROWLEY Witnesses M. L. LIGGETT, Y W. E. CRANFORD.

